Examples
http://www.janesgoodadvice.com/JanesAdviceColumn.en.html
http://www.uexpress.com/dearabby/
http://www.washingtonpost.com/lifestyle/style/ask-amy-brothers-behavior-creates-wedding-drama/2013/03/12/0596567a-881d-11e2-999e-5f8e0410cb9d_story.html

Characteristics (must have)
-give advice
-don't tell what to do-suggest!
-opinions
-requests for advice and comments
-questions usually asked anonymously-signature addresses the problem
-one main topic/problem to address and answer

Criteria (how to make it good)
-easy to understand
-relatable, practical
-entertaining
-not too formal-like speaking
-usually in magazine or newspaper-format like that
-many times, emotional
-include date
-pictures by name